package cn.tedu.v4;

import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;


public class Client {
    private static final Integer PORT = 4545;
    private static final String HOST="127.0.0.1";
    private Socket socket;
    private BufferedReader br;
    private PrintWriter pw;
    private String ip;

    public Client() {

        try {
            socket = new Socket(HOST, PORT);
            br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));
            pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
        } catch (UnknownHostException e) {
            System.out.println("IP传入错误了");
        } catch (IOException e) {
            System.out.println("客户端链接服务器端：IO流操作出现错误，或者服务器端未启动");
        }
    }

    public static void main(String[] args) {
        new Client().start();
    }
    public void start() {
        try {
            new Thread(() -> {
                try {
                    String message;
                    while ((message = br.readLine()) != null) {
                        System.out.println("这是服务器端说的： " + message);
                        System.out.println("请客户端输入：");
                    }
                } catch (IOException e) {
                    System.out.println("服务器端读入失败了");
                }
            }).start();
            Scanner input = new Scanner(System.in);
            while (true) {
                System.out.println("请客户端输入");
                String line = input.nextLine();
                pw.println("客户端说：" + line);  //发给服务器
            }
        } catch (NullPointerException e) {
            System.out.println("IP传入错误导致链接失败，也可能是端口号错误");
        } finally {
            if (br != null)
                try {
                    br.close();
                } catch (IOException e) {
                    System.out.println("客户端通讯关闭失败");
                }
            if (pw != null)
                pw.close();
            if (socket != null && !socket.isClosed()) {
                try {
                    socket.close();
                } catch (IOException e) {
                    System.out.println("客户端通讯关闭失败了");
                }
            }
        }
    }
}
